FlickerDimmingPower

EfficientLED Drivers

AccurIC’s technology is available in formats to suit almost any LED driver application. Our drivers supply output powers from 8W to 200W. Scroll down for more information.

Product Applications

We can configure our drivers with voltages from 55V to 200V and with currents from 100mA to 1A. We have low cost, non-dimming, small form factor integrated LED drivers for LED replacement A lamps. Our ‘full service’ integrated LED drivers work with legacy mains dimmers and with all commercial two wire dimming signals. We can implement our Driver IC and reference designs in many different applications. Small form-factor LED drivers for replacement lamps is a typical application. ‘Driver-on- Board’; LED drivers for use in luminaires is another common application. And we have a range of ‘external LED driver’ products.

Patent Protection

Four patent families protect our core technology. We have protected our technology by filing patents in all significant general lighting markets. So far, over 50 countries have granted our first and second patents, including the USA. We therefore have the freedom to license our technology for use in specific products in specific geographies.

Product Availability/Development

As part of our product development program we have built pre-production prototypes. They demonstrate our two main product families. First, a mains dimming solution for the residential lamp market, and second, a 0-10v dimming solution for the commercial lamp market. We are instantiating key elements of our designs on an ASIC or Driver IC. We expect our Driver IC and reference designs to be available in late 2017.
Product Development Partners: A team of highly experienced electronic design and ASIC engineers works with us. We expect to bring our Driver IC (ASIC) and reference designs to market in 2017. The product development team includes ML Electronics, Marl International and Productivity Engineering.

Ultra-Wide Application Range

AccurIC supplies patented LED driver technology. We are building a Driver IC and reference designs for delivery in 2017.

AccurIC LED drivers convert line Alternating Current (AC) into pure Direct Current (DC). Lamp designers can use our LED drivers to drive all LED modules and lamps that require power in the range from 8W to 200W.

AccurIC’s Driver IC and reference designs are suitable for a wide range of applications. These include small form-factor integrated LED drivers used in replacement LED lamps, Driver on Board designs for luminaires, and external drivers for higher power outputs.

AccurIC Mission

Our mission and purpose is to become the premier supplier of Driver ICs to the global general lighting market. We will achieve this by having the most capable and best value Driver IC on the market. We are a fabless semiconductor company. Our IP covers all economies which have significant demand for lighting. We are the sole source of our Driver IC and our linear current regulator.

AccurIC LED Driver Capabilities

Our LED drivers deliver superior performance on the critical variables:
Ultra-low flicker across the full dimming range
Ultra-deep dimming using 3KHz PWM
High Power Factor and low Harmonic Distortion across the dimming range
User-settable dimming curves
Mains dimming with AccurIC Driver IC and patented algorithms
Two wire dimming with standard protocols, eg 0-10 Volts, DALI, DMX
32 bit processor on our Driver IC with memory for customer applications
UART, SPI, IC2 connections for custom functionality

Why Our LED Driver Is The Best

Consumer Benefitsdesignstrategyidenitydesign

High Quallity

Better quality light with ultra-low flicker at all dimming levels.

Better Dimming

Ultra-deep dimming down to less than 0.1% output

Energy Saving

Very high power conversion efficiency at all dimming levels

Low Cost

Non dimming replacement lamps

Replacement

Dimming replacement inter-operable with both legacy mains dimmer switches and modern replacements

Longer Lifespan

These LEDs have longer lamp/luminaire lifespan

Accuric LED Driver Technology

AccurIC has designed all its LED drivers on a common technology platform. We have patented the critical components of our LED driver technology. They are:
• A linear constant current regulator
• A flyback converter topology using our constant current regulator
• A mains dimming (‘phase cut dimming’ algorithm and hardware

The patented linear constant current regulator is common to all our designs. Its key attribute is its insensitivity to changes in voltage. ‘Slope impedance’, the measure of this insensitivity, is over 5 kOhms.

The constant current regulator’s insensitivity to changes in voltage eliminates virtually all current ripple. It therefore enables a pure Direct Current. Lamp designers can also build low cost non-dimming laps with ultra low flicker by adding our constant current regulator to their LED modules.

We have designed our LED drivers to be the most versatile on the market. They work with all commonly used dimming systems. In particular, they work with all legacy mains dimmer switches used in homes. Furthermore our drivers also operate with dimming signals from all conventional ‘two wire’; dimming systems eg 0-10V, DALI, DMX. They offer a choice of output dimming method. Customers can choose to dim output current using either Pulse Width Modulation (PWM) at 3kHz.

We integrate our Driver IC into all our LED drivers. It uses a 32 bit processor core. This operates our control software, carries out analogue sensing, and performs PWM control functions. Our driver chip has Ic2, UART and SPI ports to allow integration with WiFi or Power Line Communications functionality.

AccurIC LED Driver Applications Our LED drivers are suitable for a very broad range of applications:

*Any LED light engine requiring constant drive current at any output DC voltage from 55V to 200V and any output power from 8W to 200W *Low cost non dimmable lamps and luminaires  Mains dimmable lamps and luminaires; interoperable with existing legacy wall dimmers – leading edge and lagging edge phase modulation  Small form factor replacement lamps eg A lamps, GU10s  Driver on board applications for integrated LED modules and luminaires for surface mount assembly  External LED drivers – broad ‘window’ power outputs and single outputs

LAMP/LUMINAIRE DESIGNER BENEFITS Lamp designers benefits from the following features of our technology:

Exclusive licensing for product and geographic market segments Demonstrable competitive advantages in terms of IEEE1789 Flicker Percent versus Frequency curve, dimming range and efficiency Inter-operable with all standard two wire dimming systems eg 0-10V, DALI and DMX PWM dimming: flicker at only two frequencies: rectified mains and 3 KHz Driver topologies shared across all AccuriIC solutions Driver IC family common to all LED driver solutions Broadest range of capabilities and applications Small/competitive BOM Future proof against foreseeable regulatory requirements

EXTERNAL LED DRIVER MAKER BENEFITS External LED driver makers benefit from the following features of our technology

Exclusive licensing available for product and geographic market segments Window and single power output topologies available Demonstrable competitive advantages in term of dimming, flicker and power factor

INDEPENDENT TEST RESULTS

Lux TSI has tested one of our 0-10V LED driver prototypes. Lux TSI tested a voltage dimmable window LED driver driving a 63W LED lamp running at 350mA and 180V. Clicke here to view the Lux TSI the test certificate. TRN-17439 - AccurIC 0-10V dimming - Certificate

LED PROFESSIONAL SYMPOSIUM

AccurIC presented a paper entitled "Near-zero flicker, high power factor and deep-dimming. Eliminating the supposed conflict" at this year's LED Professional Symposium in Austria.  Click here to download the paper.AccurIC Paper LpS 2016 Final Embarged till 1500 on 21092016 The critical performance targets for an electronics engineer when building an LED driver are: flicker, dimming, and power factor. Normally, these goals are mutually antagonistic. For example, an electronics engineer can achieve low flicker at the expense of a narrow dimming range; or attain a high power factor at the expense of poor flicker and limited dimming. The trick is to achieve all three objectives without sacrificing performance on any single criteria. AccurIC's technology delivers the best LED driver performance on all three criteria simultaneously at all points in the dimming curve. Click here to download Dave Bannister's presentation to the Symposium.Flicker Dimming and power factor AccurIC presentation 2016 09 21

DIMMING

Consumers value dimming because it allows the user to change the ambiance of a room using the same lamps. It is also offers the potential to use light more efficiently. For example sensors can adjust the light level to take account of the daylight coming through windows. Regulators now stipulate that new lighting installations must have lighting controls and minimum dimming levels in order to reduce energy consumption. The human eye is more sensitive to changes in low levels of light. Measured light output at 10% of full output is equivalent to 30% perceived output. So dimming systems that only dim to 10% do not fulfil consumer expectations or match the performance of incandescent lighting. AccurIC solves these problems with ultra-deep, ultra-low flicker dimming. Our patented systems enable dimming to below 0.1%.

FLICKER

The bane of LED lighting is photometric flicker.  miller+lehman_flicker_lightfair2015 LEDs are hyper-sensitive to drive current and reveal any shortcomings in line AC mains power conversion and dimming methodology. LED drivers have struggled to deliver deep dimming with acceptable flicker and power factor performance. AccurIC solves these problems with its patented linear current regulator, driver topology and dimming algorithms. However you look at it, quasi zero flicker for little or no extra cost is worth having. AccurIC drivers make LED lighting better quality than incandescent lighting.

EFFICIENCY AND POWER FACTOR

Inefficient and/or low Power Factor electronics ruins the performance of the LED lighting system in a building.  The use of inefficient LED drivers can squander the energy savings from a high lumens per watt LED module. The use of LED drivers with low Power Factor (0.8 or below) can contribute to strains elsewhere on the Grid. Such ‘strains’ can include the overheating of mains distribution transformers. For this reason, energy distribution companies often take account of Power Factor when setting tariffs, particularly for large business customers. AccurIC solves these problems through a combination high efficiency at all points on the dimming curve, high Power Factor (typically 0.98) and low Total Harmonic Distortion (typically 10%). AccurIC drivers therefore help large businesses avoid so-called ‘Reactive Power charges’ as well as helping domestic consumers maximise energy-saving.

LED DRIVER MARKET

Markets & Markets (M&M) has published an analysis of the prospective growth in the LED driver market:-"LED Driver Market for Lighting: Global Forecasts to 2022". The segments of the LED market which will grow the fastest from 2016 to 2022 are:  the constant current LED drivers segment and  the dimmable constant current LED drivers segment. Our LED drivers specifically address the needs of these two segments. Together these represent the vast majority of our market opportunity. M&M estimates that the value of global sales of LED drivers will rise from c $6bn in 2016 to c $25bn in 2022. Its model forecasts that the value of constant current LED drivers sold will grow by 50% compound from 2016 to 2033. And M&M projects that the value of dimmable constant current LED drivers will grow by 30% compound. It estimates that the Driver IC market is worth c $1bn in 2016 and will grow to $5bn in 2022. Most of the Driver IC market is addressable by our technology.

IMPROVING THE QUALITY OF LED DRIVERS

Consumers expect LED lamps to dim as effectively as incandescent bulbs. In 2014 the US Dept. of Energy (DOE) commissioned an analysis of 14 dimmable LED replacement A lamps. The DOE published the research as the 'Caliper Retail Lamps Study 3.1'. It is available here. http://energy.gov/sites/prod/files/2015/01/f19/caliper_retail-study_3- 1.pdf The study highlights the widely differing performance of LED lamps. In particular, it analyses their poor flicker and power factor performance. Both flicker and Power Factor deteriorate during dimming. The charts below illustrate the performance of the LED lamps analysed.Lighting consumes around 15-20% of the electricity used in commercial and residential buildings. Society and Regulators need to accelerate the rate of SSL adoption in order to reduce energy demand and carbon emissions. The US Dept. of Energy (DOE) seeks to improve the quality of 'Solid State Lighting (SSL). In its R&D Plan 2016' it states (p66): there is a significant opportunity to "improve reliability of the driver, including ... reliability limitations of many of the subcomponents". It goes on, "... and to improve driver performance in terms of efficiency and flicker while the driver is operating at a dimmed setting.

THE EFFECTS OF FLICKER ON HUMAN HEALTH

In 2008, the Institute of Electronic and Electrical Engineers (IEEE) established a committee called PAR 1789. It has investigated the effects of photometric flicker on human health. In 2010 the 1789 Committee published 'A Review of the Literature on Light Flicker'. Its analysis is based on 92 peer reviewed studies carried out between 1954 and 2014. IEEE FlickerTR1_2_26_10 In June 2015, after passing all the ballot stages in the IEEE review process, the committee published its recommendations as IEEE1789. Very few LED drivers meet all the IEEE1789 recommendations. Notably, AccurIC LED drivers meet all of its recommendations. They also comply with the most stringent requirements for dimming depth and Power Factor.